نتایج جستجو برای: magnetic ferrite

تعداد نتایج: 343431  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده فیزیک 1390

in this thesis, barium ferrite nano particles were prepared by sol-gel method. their structural and magnetic properties of samples have been investigated using thermo gravimetric analysis (tg-dta), x-ray powder diffractometer (xrd), fourier transform infrared (ftir), scanning electron microscopy (sem), field emission scanning electron microscopy (fesem), ac susceptometer, vibrating sample magne...

2015
K. Bi K. Huang L. Y. Zeng M. H. Zhou Q. M. Wang Y. G. Wang M. Lei Fuli Zhang

A ferrite-dielectric metamaterial composed of dielectric and ferrite cuboids has been investigated by experiments and simulations. By interacting with the electromagnetic wave, the Mie resonance can take place in the dielectric cuboids and the ferromagnetic precession will appear in the ferrite cuboids. The magnetic field distributions show the electric Mie resonance of the dielectric cuboids c...

Journal: :journal of nanostructures 0
gholamreza nabiyouni department of physics, faculty of science, arak university, arak 38156-88349, iran hamed halakoui department of physics, faculty of science, arak university, arak 38156-88349, iran davood ghanbari young researchers club, arak branch, islamic azad university, arak, iran

the lead ferrite (pbfe12o19) nanoparticles were prepared by a simple and short time microwave method. lead nitrate, iron nitrate hydrate, surfactants, and ethylene glycol were used as precursor materials. the effect of surfactants on the morphology and particle size of the magnetic products was investigated. the prepared magnetic products were study by x-ray diffraction (xrd), scanning electron...

2017
J. Tasaki T. Izushi J. TASAKI

The influence of various cations ranging from alkali metals to transition metals according to the periodic table were discussed. The ferrites used were Ni ferrite, Mg ferrite and Zn ferrite having different cation distributions in the spinel lattice. Cations having appropriate ionic radii and valencies are soluble in ferrite. Several additives formed other phase in addition to the spinel phase....

2008
M. Sigalov E. O. Kamenetskii R. Shavit

An electric current flowing around a loop produces a magnetic field and hence a magnetic flux through the loop. The ratio of the magnetic flux to the electric current is called the magnetic self-inductance. Can there be a dual situation with a magnetic current flowing around a loop and producing an electric field and hence an electric flux through the loop? Following the classical electrodynami...

2013
Hayoung Yoon Ji Sung Lee Ji Hyun Min JunHua Wu Young Keun Kim

We report the synthesis and characterization of ferrite nanocrystals which exhibit high crystallinity and narrow size distributions. The three types of samples including Zn ferrite, Mn ferrite, and Mn-Zn ferrite were prepared via a non-aqueous nanoemulsion method. The structural, chemical, and magnetic properties of the nanocrystals are analyzed by transmission electron microscopy, X-ray diffra...

2015
J. Eberhardt F. Caspers C. Vollinger

A ferrite loaded accelerating cavity with a frequency sweep of 18 to 40MHz is studied for a possible upgrade of the CERN accelerator complex. The resonance frequency of a ferrite loaded cavity shifts by applying an external magnetic bias field to the ferrite material by means of changing the relative permeability. We present the electromagnetic design of such a cavity with a special emphasis on...

Journal: :journal of ultrafine grained and nanostructured materials 0
ibrahim sharifi nanotechnology and advance materials department, materials and energy research center (merc), p.o. box 31787-316, karaj, iran. ali zamanian nanotechnology and advance materials department, materials and energy research center (merc), p.o. box 31787-316, karaj, iran. aliasghar behnamghader nanotechnology and advance materials department, materials and energy research center (merc), p.o. box 31787-316, karaj, iran.

magnetic nanoparticles attracted a great deal of attention in the medical applications due to their unique properties. the most exceptional property of magnetic particles is their response to a magnetic force, and this property has been utilized in applications such as drug targeting, bioseparation, contrast agents in magnetic resonance imaging (mri) and heating mediators for cancer therapy. in...

2014
Ke Bi Yunsheng Guo Ji Zhou Guoyan Dong Hongjie Zhao Qian Zhao Zongqi Xiao Xiaoming Liu Chuwen Lan

Ferrite metamaterials based on the negative permeability of ferromagnetic resonance in ferrites are of great interest. However, such metamaterials face a limitation that the ferromagnetic resonance can only take place while an external magnetic field applied. Here, we demonstrate a metamaterial based on permanent magnetic ferrite which exhibits not only negative refraction but also near zero re...

Journal: :journal of nanostructures 2012
r. raeisi shahraki m. ebrahimi

superparamagnetic single phase zinc ferrite nanoparticles have been prepared by coprecipitation method at 20 °c without any subsequent calcination. the composition, crystallite size, microstructure and magnetic properties of the prepared nanoparticles were investigated using x-ray diffraction (xrd), field emission scanning electron microscope (fesem), transmission electron microscope (tem), fou...

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